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SILVER M
INSTALLATION – OPERATING - MAINTENANCE
5.9. Spray humidifier
General
Switch on the pump only if the scrubber filled with water in order to
prevent damage to the slip-ring seal.
In order to warrant protection against a dry running condition, the
pump must switch off when the water level falls below 20mm above
the suction line.
Pull the floating switch cable in or out as appropriate.
The water quality must be hygienically faultless (germ-free).
The conductivity of the water must lie within the limits as set by the
manufacturer.
It must also be ensured that the condensate cannot return to the
drinking water network.
The conductivity of the water must be within the limit values
specified by the manufacturer.
The float valve must be set so that the fresh water supply shuts off
at a maximum water level 10 to 20mm below the overflow nozzle.
UV-radiation can be suitable for a continual air disinfection.
Chemical disinfection media (biocide) should be used only when
its harmlessness to health in operational concentrations can be
verified.
When using additives, it must be ensured that foam is not produced
when mixed with water.
Commissioning
Commissioning tasks are to be carried out in the following order:
Clean any foreign objects from the spray humidifier tank
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Check the spray humidifier for proper condition as well as
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possible visible damage (transport and installation damage).
Check the nozzle support tubing and nozzles for firm seating
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and direction (with or opposed to airstream)
Inspect spray humidifier pump screen
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Fill water level to 20mm above suction pipe.
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Set dry running condition protection.
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Fill the system to ca. 10-20mm below the overflow nozzle
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Set the float valve (slide the float element and adjust the lever).
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Start equipment operation, initially on the air-side, then switch
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on the spray humidifier.
Check the pump turning direction.
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Set the pump motor over current actuator to rated current,
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measure the power input and record in the protocol
Check all pipe connections for leak-tightness and re-tighten
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as necessary.
Check the float valve for function.
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Set blow-down device
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Set possible biocide additives
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Operate the spray humidifier for ca. 2-3 hours and check for
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function and leak-tightness
Subsequent to commissioning and within the first 700 operating
hours, a weekly germ-count should be made of the circulation water
and, as necessary, measures should be taken to improve the water
quality.
Maintenance
Decalcification of entire spray humidifier
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Switch off the ventilator system, add in the lime solvent to the
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circulation water and operate the circulation pump until the
lime is dissolved. Subsequently, thoroughly rinse and
neutralise the entire spray humidifier and clean the strainer.
Decalcification of the humidifier nozzles and nozzle fittings,
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under no circumstances may the nozzle bore holes be cleaned
with hard objects.
Clean the droplet separator and flow straightener with water
-
(max. 50°C) or with a thinned formic acid, decalcify and
thoroughly rinse with water or clean with a steam jet-spray
unit
Check the water quality
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Check float valve
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Clean and refill the integrated siphon
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The tank, pump and fixtures are to be emptied when operation
-
has ceased
Check the spray humidifier pump for fault-free running and
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water discharge.
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